It looks like you're looking for information on updating the software of a Huawei HG255s router, specifically with a context or story from around 2021.
Go to Updates (or Devices > Updates) and select Check for updates. update+software+in+huawei+hg255s+2021
Using the router’s built-in web interface at 192.168.1.1: It looks like you're looking for information on
Ensure Stable Internet Connection: Make sure your Huawei HG255s router has a stable internet connection. The update process requires downloading the latest software version from the internet. Force upgrade: tftp 0x80100000 firmware
tftp 0x80100000 firmware.bin; erase 0xBF050000 +0x3B0000; cp.b 0x80100000 0xBF050000 0x3B0000